Delay at GOT airport - 3hrsFlight time - 2hrsStuck at tarmac - 4hrsPassport queue - 35min Without food - so far 8hrsExpected to be home - hopefully within the hour I’m a frequent flyer but today SUCKED!!! Shame on you #Heathrow#WhatSnow

The Twitter account of British Airways, believed to be the worst affected airline, received a deluge of messages from customers unhappy about long waits but also no response on their customer service phone line.

It has reportedly cancelled 24 long-haul flights as well as dozens of shorter flights.

@British_Airways flight from Belfast City to Heathrow cancelled with no help or options to rebook at airport. Refund option not working on site or app. Calls going unanswered. Told I can’t get a refund because I checked in online. Please help. pic.twitter.com/RBeRSWCwjE

Others posted pictures of huge queues waiting for flights.

Absolute chaos at Heathrow. Cabin crew crying and consoling each other. Babies screaming. Saw a disabled person nearly get knocked out of his wheelchair in the crush. BA staff were incredible though. They couldn't do enough to help and one even kindly charged my phone for me. pic.twitter.com/Hyw8c5mpxr

Luton and Birmingham airports were also warnings of flight delays and cancellations but Heathrow appeared to suffering from the worst of it.

But as a hub airport, delays have a knock-on effect across Europe, with reports of one flight from Berlin to Heathrow being forced to turn back after an hour.

A lot of passengers are affected by delays and cancellations across Europe today.

For example the ~180 passengers on flight #BA983 Berlin -> London. Scheduled time of departure 13:50. Actual time of departure 18:57. Made a U-turn after 1h & landed back in Berlin 21:04. pic.twitter.com/xA8VQ2LiYk

@British_Airways you don’t even deign to respond to communications. My husband has been at Heathrow since 11am. He is now unable to come home because you won’t let him off a cancelled flight. This is actually sick.

Ridiculous #BritishAirways - flight 993 has been redirected to Bournemouth from Heathrow, sat on tarmac for 4 hours, poor captain trying to sort it all by himself!!! SORT IT OUT AND HELP BA!! 100's of people need to get home 😢

We’ve been here since 10am and we’ve been rebooked onto a flight out of Heathrow at 2:30 tomorrow afteenoon. Unreal! We’ve been in JFK since 4pm on Saturday. We now have to find and pay for our own hotel that’ll be refunded. This is driving me mad. So tried.

A BA spokeswoman added: “We’re very sorry that some of our customers’ travel plans have been affected by severe weather conditions.​

“Heavy rain overnight and snowfall this morning, combined with a reduction in the number of flights able to land at Heathrow have caused disruption to our flight schedule. L​ike other airlines, we are experiencing some delays and cancellations.

“We’re asking customers to check for information about their flights on ba.com before they set off for the airport, and not to come to the airport unless their flight is operating.

“We have put a flexible re-booking policy in place so that all customers due to fly from Heathrow today, Sunday December 10 and tomorrow, Monday December 11 can re-book to travel on alternative flights until Monday December 18.”

We regret that weather conditions across the UK today has resulted in some passengers experiencing disruption to their travel. Airlines are responsible for ensuring their flights are fully de-iced before they are operated, and this is resulting in some delays and cancellations.

The safety and comfort of our passengers is always our first priority and we're working closely with our airlines to ensure affected passengers are looked after. Please check the status of your flight with your airline before coming to the airport: https://t.co/zOqJyQR48T

A spokeswoman for Heathrow Airport said: “Heathrow airport remains open however we regret that weather across the UK is resulting in some passengers experiencing disruption to their travel arrangements.

“Airlines are responsible for ensuring their flights are fully de-iced before they are operated and this is resulting in some delays and cancellations.

“The safety and comfort of our passengers is always our first priority and we are working closely with our airlines to ensure affected passengers are looked after.

“Passengers should continue to check the status of their flight with their airline before coming to the airport. We apologise to those affected by today’s weather.”